XVIBE Racquetball-tennis=Squash- we here at racquets4less are having VERY VERY VERY GREAT Feedback from players around the country about the XVIBE string vibration dampener-better thar mega-sorb,better than Ektelon Silencer,Gamma worm,–it beats them all-eqasy to install-durable-and comes in BLACK-GREEN-or PINK—get 1 free with any racquet purchased at racquets4less-or get a 3 pack for only 3.99 -WITH RACQUET PURCHASE–or contact us for large quantity orders of 50 pieces or more–only 40.00 for 50 pieces includes free s/h in USA –so get 50 pack and hand them out at your next tournament or shootout-great promotional item that players will use–in BLACK-GREEN-PINK mix colors ok.just contact us for this offer,thanks,john of racquets4less..ph/8186253634.